package middleware

import (
	"github.com/gin-gonic/gin"
	"net/http"
)

// Cors 处理跨域请求，支持options访问
func Cors() gin.HandlerFunc {
	return func(c *gin.Context) {
		method := c.Request.Method
		c.Header("Access-Control-Allow-Origin", "*")
		c.Header("Access-Control-Allow-Headers", "Content-MenuType, AccessToken, X-CSRF-Token, Authorization, Token, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, accept, origin, Cache-Control, X-Requested-With")
		c.Header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, PATCH, OPTIONS")
		c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Content-MenuType")
		c.Header("Access-Control-Allow-Credentials", "true")

		// 放行所有OPTIONS方法
		if method == "OPTIONS" {
			c.AbortWithStatus(http.StatusNoContent)
		}
		// 处理请求
		c.Next()
	}
}
